package com.boot.main;

public class Study {
    public static void main(String[] args){
        //1M = 1024KB  1KB = 1024B  1B=8b  b简称位bit B简称字节 1字节等于8位
        //基础数据类型：数值、字符、布尔
//        char c = 'a';
//        System.out.println(c);
//        System.out.println((int)c);
        int[] arr = new int[5];
        int arr1[] = new int[]{1,2,3,4,5};
        int[][] arr2 = new int[2][3];
        int[][] arr3 = new int[][]{{1,2},{2,5}};
        System.out.println(arr);
        System.out.println(arr1.length);
        System.out.println(arr2.length);
        System.out.println(arr3[0][1]);
    }
}
